package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /*新增菜品和口味*/
    @Transactional//开启事务
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        //复制相应的属性
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        //获取inset语句获取的菜品id
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //循环添加口味数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //批量添加口味数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /*菜品分页查询*/
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        List<DishVO> dishList = dishMapper.pageQuery(dishPageQueryDTO);
        Page<DishVO> page = (Page<DishVO>) dishList;
        return new PageResult(page.getTotal(), page.getResult());
    }

    /*批量删除菜品*/
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否是起售状态
        ids.forEach(
                id -> {
                    Dish dish = dishMapper.getById(id);
                    if (dish.getStatus() == StatusConstant.ENABLE) {
                        throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
                    }
                }
        );

        //判断菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


        //删除菜品表中的数据和口味数据
        ids.forEach(
                id -> {
                    dishMapper.deleteById(id);
                    dishFlavorMapper.deleteByDishId(id);
                }
        );

    }

    @Override
    public DishVO getById(Long id) {
        Dish dish = dishMapper.getById(id);

        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    /*修改菜品*/
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //删除口味表中的数据
            dishFlavorMapper.deleteByDishId(dishDTO.getId());
            //重新添加口味数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public List<DishVO> getByCategoryId(Long categoryId) {
        return dishMapper.getByCategoryId(categoryId);
    }

    /*菜品的起售停售*/
    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status, id);
    }
}
